Although the origins are uncertain, experts think that this is largely due to the high level of volcanic activity in the area.

尽管起源还不确定，专家认为这主要是由该地区频繁的火山喷发所造成的。

youdao

Increase the size of the log buffer area if there is considerable read activity on a dedicated log disk, or there is high disk utilization.

如果在某个专用的日志磁盘上存在大量的读活动，或者具有较高的磁盘利用率，就增加日志缓冲区域的大小。

youdao

It was already late in the afternoon, but the small fenced-in area was full of the children's high-pitched activity.

下午很晚了，但栅栏里面的小小区域里孩子们玩得热火朝天。

youdao

It was once as high as 3, 800 meters and the surrounding area is constantly racked by seismic activity.

CNN: Keeping track of Etna's pulse

The incident took place in the Vekol Valley, a hotbed of drug- and human-smuggling activity, according to Babeu, who said his department conducted 350 high-speed chases in the area last year in an effort to curb such crime.

CNN: 5 bodies found in burned-out SUV in Arizona desert